Cannon-wheel remover



(No Model.)

H. R. BKSTROM CANNON WHEEL REMOVER.

Patented Peb. 25, 1890.

Egg.

UNITED STATES PATENT OFFICE.

HARRY R. EKSTROM, OF SANTA ROSA, ASSIGNOR OF ONE-HALF TO VADOL-PH F. GUIOL, OF LOS ANGELES, CALIFORNIAT CANNON-WHEEL REMOVER.

SPECIFICATION forming part of Letters Patent No. 422,013,`dated February 25, 1896.

Appleman flied Aprile, 1889. senin No. 305,892. (No model.)

To all whom t may concern:

Be it known that I, HARRY R. EKsTRoM, of Santa Rosa, county of Sonoma, State of California, have invented" an- Improvement in Cannon-Wheel Removers; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to a device for conveniently removing what is known as the cannon-wheel from its post in clocks.

It consists in a mechanism which will be more fully explained by reference to the accompanying drawings, in which* Figure l is an exterior view of the device opened. Fig. 2 is a vertical section showing it closed and ready to remove the wheel. Fig. 3 is a modification of the device. Fig. 4; is a face view of the plates F. j

The cannon-wheel of a clock is forced upon its post outside of the framework and so close to the plate that it is very dificultto insert a tool beneath it or to remove it without damaging the teeth of the wheel, bending the post,.or springing the frame.

In my device I have shown the jaws A A, having the elastic extensions B, which terminate at the upper end in a cylindrical tubular shank C, threaded upon and outside, as shown, to receive a nut D, which screws down upon the outside.

E is a tubular sleeve, which slips down over this shank and over the elastic extensions B, so that when forced down to the bottom it closes the jawsA together. These jaws are made hollow and concave at center to receive the cannon wheel Without touching` it. Across the -lower ends of the jaws is a thin steel plate F, the central portion of each of the opposing' jaws being cut out in a semicircular curve, so that the two of them will lit the post of the cannon-wheel when the jaws are closed together, and these plates F are so thin that they may be forced beneath the wheel by the process of closing the jaws together. When the tool is in place with the jaws inclosing the wheel and the plates F beneath it, by turning the nut D down upon the screw-threads of the shank C, the tubular sleeve E will be forced down outside of the spring-extensions B of the jaws A, and will 5o thus close the jaws together, forcing the plates beneath the cannon-wheel, which is then, as before described, inclosed in the cavity within the jaws.

G is a screw-threaded spindle, which eX- tends through the hollow shank C,turningin threads within that shank, and it has a milled head II at the upper end, by which it maybe turned. The lower end of this Vspindle will rest upon the top of the post of the cannon- 6o wheel, and when turned down this post acts as a fulcrum, so that the turning of this screw will draw the jaws A up, and thus by means of the plates F pull the cannonwheel off of the post by steady pressure, which will 6 5 do it no damage and will not bend or strain the other parts.

In Fig. 3 I have shown a modication in which only one of the jaws A is employed, the cavity within it forming more than a 7o semicircle, and the plate F has a slot in it from one side,made of sufficient size to surl round the cannon-wheel post and allow the plate to pass beneath the cannon-wheel. In this case no slidingsleeve or screw is necessary to close the jaws, as there is only a single one used. This jaw has upon the black a projection or anvil I, which may be struck by a hammer, so as to force the plate F beneath the cannonwheel. The screw-threadedspin- 8o die Gl is then turned down so as to rest upon the top of the cannon-wheel post, and the opn eration-is then carried out in the same man ner as before described.

Having thus described my invention, what I 8 5 desire to secure by Letters Patent isl. The concave jaws with the bottom plates F and the elastic extensions, the tubular shank screWat-hreaded upon the outside, a sleeve inclosing the jaws and extensions, and 9o a nut D, by which the sleeve is forced down to close the jaws and close the plates together, substantially as and for the purpose described.

2. The concave jaws with the bottom plates F and the elastic extensions, the tubular shank screw-threaded upon the outside and in side, a sleeve inolosing the jaws and exten- In Witness whereof I have hereunto Set my sions, and a nut turning upon the outside of hand. the shank to force the sleeve down and close o the jaws, in combination With a central sorew- HARRY R. EKSTROM. 5 threaded stenr or shank turning in the inside of the tubular shank and having its lower end Witnesses: adapted to press upon the end of the Wheel- H. C. BROWN, post, substantially as herein described. a J. H. DYsoN. 

